2-Methyl-4-(naphthalen-2-yl)-3a-nitro-3,3a,4,9b-tetra-hydro-2H-spiro-[chromeno[3,4-c]pyrrole-1,3'-indolin]-2'-one

• Published in: Acta crystallographica. Section E, Structure reports online Structure reports online, 2013, Vol.69 (Pt 7), p.o1045-o1046
• Main Authors: Devi, Seenivasan Karthiga, Srinivasan, Thothadri, Rao, Jonnalagadda Naga Siva, Raghunathan, Raghavachary, Velmurugan, Devadasan
• Format: Article
• Language: English
• Subjects: Organic Papers
• ISSN: 1600-5368; 1600-5368
• DOI: 10.1107/S160053681301533X

In the title compound, C29H23N3O4, the 2-methylpyrrolidine ring adopts a twist conformation on the N-C bond involving the spiro C atom, while the hydropyran ring adopts an envelope conformation with the methine C atom bonded to the O atom as the flap. The mean plane of the indoline-2-one ring system is almost perpendicular to the mean plane of the pyrrolidine ring, making a dihedral angle of 89.73 (8)°. The latter ring makes dihedral angles of 47.80 (8) with the naphthalene ring system and 32.38 (8)° with the hydropyran ring mean plane. There is an intra-molecular C-H⋯O hydrogen bond involving the indoline-2-one O atom. In the crystal, adjacent mol-ecules are linked via N-H⋯O hydrogen bonds, forming chains propagating along [100]. The chains are linked via weak C-H⋯O hydrogen bonds, forming two-dimensional networks, lying parallel to (101), and consolidated by C-H⋯π inter-actions.